• PT Youtube
  • CW Facebook
  • CW Linkedin
  • CW Twitter
4/30/2014 | 1 MINUTE READ

Nonhalogenated flame retardants

Facebook Share Icon LinkedIn Share Icon Twitter Share Icon Share by EMail icon Print Icon

Clariant highlighted the advantages of its nonhalongenated, phosphinate-based Exolit OP range and Exolit AP range of flame retardant (FR) additives.

Share

Facebook Share Icon LinkedIn Share Icon Twitter Share Icon Share by EMail icon Print Icon

Clariant (Muttenz, Switzerland) highlighted the advantages of its nonhalongenated, phosphinate-based Exolit OP range and Exolit AP range of flame retardant (FR) additives. Designed initially for the electronics and electrical equipment markets, the Exolit OP range is said to offer high thermal stability and good property profiles at comparably low doses in epoxy and polyester resin systems used in commercial aircraft interior composites applications. The Exolit AP range, based on ammonium polyphosphate, is formulated for use in thermoset resins that form the matrices in fiberglass-reinforced composites. Intended as a replacement for brominated and chlorinated FR products, the AP range can be used alone or in combination with ATH. “Halogenated flame retardants quench the reaction in the flame zone,” says Dr. Adrian Beard, the head of marketing and advocacy for flame retardants in Clariant’s Additives business unit, “but they create a lot of smoke.  So in addition to the environmental problem, there is the aspect of smoke toxicity in case of fire.” Further, most FR additives must be mixed with other products to create an intumescent layer that foams and hardens to isolate flammable materials from oxygen. The AP products, however, interact with the internal chemistries of epoxy and polyester resins to create the intumescent effect without other additives. As a result, additive loadings, part weight and cost can be reduced. Clariant plans to work with aerospace primes to qualify the Exolit AP range for aircraft interiors. 

Resources